There is no easy answer for feral hogs. I have two pieces of property. One is adjacent to public land where they prohibited hunters killing hogs for about four years and they trapped hogs. The other piece of land is adjacent to public land where hogs may be hunted year round and no trapping. The property where hunting was banned is now so overwhelmed with hogs I cant olant a soybean seed without them rooting it up that night. I killed 85 hogs off that 60 acre property in 8 months and cant tell the difference. My property next to the public land that still gets hunted has a few hogs. They dont do any rooting damage and are wild as the deer. I understand in areas where hogs are just becoming established, banning sport hunting to reduce the incentive to move hogs. I areas where hogs are already well established - banning sport hunting only makes the problem worse. My advice - kill them by any and all means possible.
I have an acquantance who owns three hundred acres in georgia. He planted twenty acres of corn and has a group of hog doggers come in about every two weeks. Hogs only got two acres. Shoot them, trap them, hog dog them - just keep the pressure on them.